In Ireland the tribes are called after the founder, as the Hy Conaill, Hy Fiachra, or sons of Conal, sons of Fiech, though grand, great-grand, and great-great-grandchildren. Now the Irish who had invaded South Wales were not allowed a peaceful time in which to consolidate their power, for in the time of the grandchildren of Brychan, if not in that of his son Cledwyn, king of Carmarthen, there came down a Northern Briton, named Dyfnwal, into South Wales and drove them out, and pretty well exterminated the family of Cledwyn. This must have been about the year 500, and it was probably due to this that so many of Brychan's sons and daughters and grandchildren took to their heels and crossed the Severn Sea, and established themselves in North Devon and Cornwall. It was not till about fifty years later that Caradoc Strong-i'-th'-Arm, the son of a granddaughter of Brychan and prince of Gallewig, the region about Callington, marched westward from the Severn, and expelled the invaders, and recovered Brecknockshire. When the great migration took place it comprised not only the family of King Brychan, but also the Gwentian royal family, that was allied to it by blood. Of course there has accumulated a certain amount of legend about Brychan, and we cannot really be sure that such a person ever existed; that, in fact, the name is not really that of a clan, for Breogan, which is the same as the Welsh Brychan, was the reputed ancestor of one of the branches of the Scots or Irish who migrated, according to legend, from Spain to the Emerald Isle.[1] What is true is that a certain Irish clan did invade and occupy Brecknock and Carmarthen, as well as Pembrokeshire, and that about 530 they were driven out of the two first counties, and that they thereupon invaded and occupied North-East Cornwall from Padstow harbour, and the north of Devon as far as Exmoor. This was not by any means a first descent. The whole coast had been a prey to invasions from Ireland for two centuries. On this occasion among the Irish-Welsh from Gwent and Brecknock came a great number of saints, that is to say, princes and princesses devoted to the ecclesiastical profession. The significance of this I shall explain presently. I will here only point out that almost all the foundations of churches in North-east Cornwall were made by members of the same Gwent-Brecknock family. Is there, it may be asked, any Irish record of this invasion? We have a good many records of earlier forays and occupations of Britain by the Irish, but of this particular one only a somewhat confused legend. There was a certain Princess Earca, married to a king named Saran, in Ireland, who was much engaged in raids in Britain. She was the daughter of Loarn, king of Alba or Scotland, from whom Lorn takes its name, the date of whose birth is given by the Irish annalists as taking place in 434. He was, in fact, one of the Irish Ulster adventurers who invaded Scotland.